Leg Anatomy Lateral and Posterior Compartments

Question 1

The lateral compartment of the leg is made up of what sorts of muscles?

Answer 1

The everters of the leg! These are the smallest.

Question 2

What is the lateral compartment of the leg bounded by?

Answer 2

Anterior and posterior intermuscular septa, the fibula and the crural fascia.

Question 3

What is the main nerve found in the lateral compartment of the leg?

Answer 3

The superficial peroneal nerve

Question 4

What arteries are found within the lateral compartment of the leg?

Answer 4

Branches from the peroneal artery (from the posterior compartment) and branches from the anterior tibial artery (from the anterior compartment)

Question 5

What sort of muscles are found in the posterior compartment of the leg?

Answer 5

Muscles that produce plantar flexion as well as inversion of the foot are found here. This is the largest of the three compartments

Question 6

What is the main nerve of the posterior compartment of the leg?

Answer 6

Tibial nerve

Question 7

What arteries are found in the posterior compartment of the leg?

Answer 7

The posterior tibial and peroneal arteries are found back here.

Question 8

What is the origin of the gastrocnemius muscle?

Answer 8

The lateral and medial condyles of the femur

Question 9

What is the insertion of the gastrocnemius muscle?

Answer 9

The calcaneus

Question 10

What is the action of the gastrocnemius?

Answer 10

Flexes the leg at the knee joint and plantar flexes the foot.

Question 11

What is the origin of the soleus?

Answer 11

Fibula, soleal line of the tibia

Question 12

What is the insertion of the soleus?

Answer 12

The insertion is on the calcaneus.

Question 13

What is the action of the soleus?

Answer 13

No action at the knee. Acts as an antigravity muscle with muscles continuously active while standing.

Question 14

What makes up the triceps surae?

Answer 14

The gastrocnemius and the soleus together make up this concept. Generating 95% of all plantar flexion.

Question 15

What is the origin of the plantaris muscle?

Answer 15

The plantaris originates along the lateral supracondylar line of the femur inserting on the calcaneus.

Question 16

Where does the flexor hallucis longus originate from?

Answer 16

The fibula and the Interosserus membrane.

Question 17

Where does the flexor hallucis longus insert into?

Answer 17

Flexor hallucis longus inserts into the 1st distal phalanx.

Question 18

Where does the flexor digitorum longus originate from?

Answer 18

Originates along the tibia inferior to the soleal line.

Question 19

Where does the tibialis posterior originate from?

Answer 19

The tibia, fibula, and IO membrane.

Question 20

Where does the tibialis posterior insert into?

Answer 20

The navicular, cuneiforms, cuboid, and bases of 2-4 metatarsals.

Question 21

What are the arteries of the posterior compartment of the leg?

Answer 21

The posterior tibial which is a branching off the popliteal artery.

Question 22

What does the posterior tibial artery give rise to?

Answer 22

The circumflex fibular 
Peroneal
Nutrient
Muscular
Posterior medial malleolar
Communicating
Medial calcaneal (posterior)
Medial Plantar
Lateral Plantar.